Charles e



(No Model.)

0. E. SORIBNER. DASH POT FOR ELECTRIC ARG LIGHTS.

Patented Jan. 18, 1887.

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UNITED STATES PATENT rricn.

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE \VESTERN ELECTRIC COMPANY, OF SAME PLACE.

DASH-POT FOR ELECTRIC-ARC LiGHTS.

SPECIFICATION forming part of Letters Patent No. 356,211, dated January 18, 1887.

Application filed June 1, 1886.

T aZZ whom it may concern:

Be it known-that 1, CHARLES E. SCRIBNER, a citizen of the United States, residing at Chi cago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Dash-Pots for Electric-Arc Lamps, (Case 106) of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

In electric-arc lamps dash-pots are used to steady the act-ion ot the lovers which carry the clutches and regulate the feed of the lamp. I have found, however, that at acertain point in the feeding of the carbon it is desirable to relieve the levers of arc lamps from the sluggish retardation of the dash-pots. The lifting-lever in its normal position carries and sustains the carbon-rod. At the moment of feeding the lever moves so as to open the clutch and release the rod. The return of the lever to its normal position stops the feed and prevents too great a shortening of the are. It is at the time the lever is thus returning to stop 2 the feed that it should be free of the retardation of the dash-pot.

My invention consists in connecting the piston of the daslrpot with the lifting-lever ofthe arc lamp in such a manner that the lever may move a short distance unretardcd by the sluggish action of the daslrpots. The lever, after each feed, is thus permitted to return promptly a short distance without retardation. The lamp is thus prevented from becoming dim,

as heretofore, since the downward motion of the carbon-rod is promptly checked. This will be readily understood by the accompanying drawings, in which-v Figure l is a detailed view, partly in sec- 40 tion, of the lever carrying the clutch and the piston of the dash-pot suspended to said lever in accordancewith my said invention, so that there may be a little independent or lost motion between them. Fig. 2 is a side elevation 5 showing the magnets and armature-levers of an arc lamp in connection with the lever, clutch, and dash-pot shown in Fig. 1. Fig. 8 is a detailed. view of the manner of connecting the piston of the dash-pot with the lifting 5o lever.

Like parts are indicated by similar letters of reference in the different figures.

(No model.)

The action of the regulalirig-magnets ofarc lamps is well known, and need not, therefore, be described in detail.

The lifting-magnets operate to separate the carbons and establish the are. As the resistance of the arc increases more current is shunted through the magnet in the shunt of the arc, until finally the clutch opens and the rod is released, thus effecting a feed of the carbon, The resistance of the arc is thus diminished, and the magnet in the shunt of the arc operates to raise the clutch and cause it to grasp and arrest the descent of the rod. It is this upward movement of the clutch that I have found should be unobstructed by the-sluggish action of the dash-pot, in order that the carbon may not descend far enough to dim the light and cause it to wink.

The lever a, which carries the clutch, is provided with the pin 1), which passes through the bifurcated end of said lever, as shown. The end of the pistourod c of the daslrpot is provided with a slot or opening through which 7 the pin Z) is inserted. The slot at the end of the piston-rod is preferably about twice the diameter of the pin vertically. The spring (I is secured to the lever, as shown at c, and its tension is so adjusted that it will normally hold 8c the pistonrod of the dash-pot, as shown in Fig. 1, so that the pin 1) will rest in the lower portion of the slot in the upper end of the piston-rod. It is evident that when the lever is thus connected with the piston-rod the lever may move upward so as to bring the pin to the top of the slot without retardation from the dash-pot. The resistance the spring offers to the movement of the lever is not of such character as to cause the lever to move Sing 0 gishly, and hence the descent of the carbon is checked at once and the lamp is prevented from winking at each feed of the carbon. After the lever has lifted the clutch and stopped the feed, the dash-pot piston is lifted by the 5 spring d to the position shown. Thus it will be seen that at the moment of returning to its normal position the lever is free from the retardation of the dash, and at other times is acted upon by the dash-pot in the usual man- Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the lifting-lever of an arc lamp, of a dash-pot, a slot and pin for connecting the piston-rod of said dash-pot with the said lever, and a spring for holding said pistonrod normally toward the lever, whereby the lever, as it returns to its normal position after a feed, is unretarded by the dashpot.

2. The combination, in an electricarc lamp, of the lifting-lever with the piston-rod of the dash-pot connected to said lever by a loose connection, and a spring, (I, for holding said piston-rod when the lever is in its normal potion, whereby the lever is unretarded by the dash-pot immediately after each feed of the carbon.

3. The combination, with the lever a, which carries the clutch, of the piston-rod c, the pin 6, and the slot in which pin 2) rests, and the spring (I, attached at e to the lever, and serving to sustain the piston of the dash-pot, whereby the lever is unretarded by the dashpot as it returns to its normal position after each feed of the carbon.-

In witness whereof I hereunto subscribe my name this 29th day of May, A. D. 1886.

CHARLES E. SORIBNER.

YVitnesses:

GEORGE P. BARTON, F. H. MoCULLooH. 

